Elkhanan HaKadosh Tosaphist Joffe of Dampierre, The Martyr, הי״ד

• Elhanan ben Isaac of Dampierre Wikipedia

Rabbi Elhanan ben Isaac Jaffe of Dampierre (Hebrew: רבי אלחנן בן יצחק; d. 1184) also known as Rabbeinu Elhanan was an 12th-century French Tosafist and the son Isaac ben Samuel. He is mostly known for his numerous commentaries on the Talmudic tractates, Avodah Zarah and Yoma among other notable commentaries. He is also the founder of the Jaffe family. Born in Dampierre, France, his father was the head of the Dampierre Yeshiva. Rabbi Elhanan had several illustrious pupils, such as Judah ben Isaac Messer Leon. His tosafot are numerous and were often quoted by contemporary scholars, and are mentioned in "Minḥat Yehudah", "Shibbole ha-Leḳeṭ" and Rambam's "Sefer Hafla'ah". He is also credited for two works of his own: "Tiḳḳun Tefillin" - a treatise on Tefillin, and several piyyutim related to passover. Rabbi Elhanan was martyred in 1184.

https://tablet.otzar.org/#/b/7621/p/-1/t/1688210249036/fs/2HlIINQYC...

חיבר קבצי תוספות המכונים תוספות רבנו אלחנן

אביו העריכו עד מאוד, ואף נתן לו לענות תשובות לשאלות שנשלחו אליו

נרצח בחיי אביו

He composed additions that are called the additions of Rabbeinu Elchanan

His father appreciated him very much, and even gave him answers to questions that were sent to him

Killed during his father's life